[skip ci] ci: remove signing key configuration that's causing release failures

Author: jdaugherty

grails-gradle/build.gradle

@@ -64,9 +64,6 @@ ext {
     buildDate = (buildInstant as Instant).atZone(ZoneOffset.UTC) // for reproducible builds
 
     isReleaseVersion = Boolean.parseBoolean(System.getenv('GRAILS_PUBLISH_RELEASE'))
-    ext.'signing.keyId' = project.findProperty('signing.keyId') ?: System.getenv('SIGNING_KEY')
-    ext.'signing.password' = project.findProperty('signing.password') ?: System.getenv('SIGNING_PASSPHRASE')
-    ext.'signing.secretKeyRingFile' = project.findProperty('signing.secretKeyRingFile') ?: "${System.properties['user.home']}${File.separator}.gnupg${File.separator}secring.gpg"
     isCiBuild = System.getenv().containsKey('CI')
     configuredTestParallel = findProperty('maxTestParallel') as Integer ?: (isCiBuild ? 3 : Runtime.runtime.availableProcessors() * 3/4 as int ?: 1)
 }